INCOME TAXES (Details 3) (USD $)	Apr. 30, 2013	Apr. 30, 2012
Deferred tax assets:
Allowance for doubtful accounts	$ 226,998	$ 246,238
Inventory markdown reserve	3,597	0
Reserve for loss on work-in-progress	8,610	648,096
Net operating loss carryforward	484,827	180,741
Bonus and vacation accruals	148,282	86,120
Non-qualified stock options	67,050	51,712
Federal benefit for foreign tax credit	132,800	132,800
Valuation allowance	(966,902)	(972,884)
Deferred tax assets-current	105,262	372,823
Intangible assets	3,375	3,682
Goodwill	39,210	42,782
Property and equipment	355,489	355,489
Net operating loss carryforward	8,551,386	6,889,345
Valuation allowance	(8,853,193)	(6,586,769)
Deferred tax assets-long-term	96,267	704,529
Deferred tax liabilities:
Deferred revenue	(13,888)	(65,273)
Deferred tax liabilities-current	(13,888)	(65,273)
Property and equipment	(111,801)	(134,661)
Intangible assets	(75,840)	(118,107)
Cumulative translation adjustments	0	(207,762)
Deferred tax liabilities-long-term	(187,641)	(460,530)
Net deferred tax assets	$ 0	$ 551,549